Shapes is the ultimate collection of Lines games. It includes not one, not two, not even three, but four Lines games:
1. classic Lines game played on square board;
2. Lines game on diamond board;
3. Hex Lines - the Lines on the hexagonal board and easiest of the bunch;
4. Triangle - the Lines game on triangular board - the most challenging one.
Like with all our games (and unlike our competitors) board size, number of colors, etc is configurable, so you (not the program) decide how challenging you want your game to be. Yep, we too like to play it dumb sometimes and max the board, min the colors.
If you are not quite sure what the heck Lines is, wikipedia is your friend, but essentially colored balls are thrown on to the board, you move them with your finger trying to form a line of at least five of the same color, once the line is formed it is removed from the board. Like with Tetris you just can not win. Wikipedia would tell you though that by the time you started playing Tetris those Russkies switched to Lines already.
You could buy all of the Lines games "a la carte" as (Lines, Hex and Triangle), but serious Lines fanatics opt for a bundle and get "buy two get two free" deal.